Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea
In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal...
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ftunibueairesbd:todo:paper_NIS19260_v56_n_p377_Boltovskoy 2023-10-29T02:30:36+01:00 Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea Boltovskoy, D. Alder, V.A. https://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy unknown http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy 2023-10-05T01:39:06Z In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal quantitative distribution trends are not visibly affected by ice cover or primary production. On the other hand, comparison of polycystine standing stocks at 0 to 400 m versus their accumulation rates at 400 to 900 m indicates that >90% of the shells are lost to sedimentation. It is suggested that mechanical fragmentation by grazing (rather than dissolution) is primarily responsible for this loss. Deep habitat and high destruction rates in the water column are important factors which hinder the use of Antarctic polycystine thanatocoenoses for paleoecological reconstructions. -Authors Journal/Newspaper Antarc* Antarctic Weddell Sea Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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ftunibueairesbd |
language |
unknown |
topic |
accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea |
spellingShingle |
accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea Boltovskoy, D. Alder, V.A. Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
topic_facet |
accumulation rates distribution palaeoecology radiolarian standing stocks Weddell Sea |
description |
In the Scotia and Weddell seas, polycystine radiolarians dwell chiefly at depths between 200 and 300 m, their vertical patterns being strongly associated with the higher temperatures characteristic of the Warm Deep Water. At scales of approximately 400 to 2000 km and ~30 days, radiolarian horizontal quantitative distribution trends are not visibly affected by ice cover or primary production. On the other hand, comparison of polycystine standing stocks at 0 to 400 m versus their accumulation rates at 400 to 900 m indicates that >90% of the shells are lost to sedimentation. It is suggested that mechanical fragmentation by grazing (rather than dissolution) is primarily responsible for this loss. Deep habitat and high destruction rates in the water column are important factors which hinder the use of Antarctic polycystine thanatocoenoses for paleoecological reconstructions. -Authors |
format |
Journal/Newspaper |
author |
Boltovskoy, D. Alder, V.A. |
author_facet |
Boltovskoy, D. Alder, V.A. |
author_sort |
Boltovskoy, D. |
title |
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
title_short |
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
title_full |
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
title_fullStr |
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
title_full_unstemmed |
Paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the Weddell Sea |
title_sort |
paleoecological implications of radiolarian distribution and standing stocks versus accumulation rates in the weddell sea |
url |
https://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_relation |
http://hdl.handle.net/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_NIS19260_v56_n_p377_Boltovskoy |
_version_ |
1781060023156211712 |